Transcription of Multi-Layer Ceramic Capacitors: Why and How They Fail
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Multi-Layer Ceramic Capacitors: Why and How They Fail
Multi-Layer Ceramic capacitors : Why and How They Fail Property of Passive Plus, Inc. 1 PPI MLCC materials and processes Lifetime limitations of materials Manufacturing shortcomings and defects When Bad Things Happen to Good Customers: Mishandling and design inadequacies Reliability models and testing PPI 2 Property of Passive Plus, Inc. Multi-Layer Ceramic Capacitor (MLCC) PPI 3 Property of Passive Plus, Inc. MLCC Mounted on Microstrip PPI 4 Fig. 2. Vertically mounted multilayer chip capacitor on microstrip (top view "through" dielectric cover layer)microstrip substratetracecapacitorSection R-RRRterminationFeatures: (1) A Ceramic brick with interleaved metallic electrodes (2) Soldered across a gap in microstrip center conductor (shown) or extending from center conductor to ground
• Remember: RF Voltage capability can be quite different from DC voltage capability and, above a certain point, typically decreases with increasing frequency. It is also dependent on pulse width. • Current Handling is a function of (1) heat generated in the capacitor (=I2*ESR) and (2) heat removed from the capacitor. In general, the
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